Clopay is the largest manufacturer and marketer of residential garage doors, commercial sectional doors and rolling steel doors in North America. Rolling steel doors and grilles for commercial, industrial, institutional, and retail use are sold under the Cornell and Cookson brands.

In addition to residential applications, commercial Clopay product solutions can be found in K-12 schools and higher education institutions, stadiums and arenas, distribution centers and warehousing facilities, healthcare, municipal, restaurants, high-rise and parking garages, as well as a variety of other facilities where reliability, security and life safety is vital.